[SpringBoot] MySQL 연동 (maven, gradle)

1. Maven MySQL 연동

 

MySQL dependency 추가하기

1. https://mvnrepository.com/

 

2. 검색창에 mysql 검색

 

3. MySQL Connector/J 클릭

 

4. 현재 MySQL 버전 클릭

 

5. Maven 선택 > 코드 복사

 

6. pom.xml에 붙여넣기

 

 

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>jpa-basic</groupId>
    <artifactId>ex1-hello-jpa</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>21</maven.compiler.source>
        <maven.compiler.target>21</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <!-- JPA 하이버네이트 -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>5.6.15.Final</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.mysql/mysql-connector-j -->
        <!-- MYSQL -->
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <version>8.2.0</version>
        </dependency>

        <dependency>
            <groupId>javax.xml.bind</groupId>
            <artifactId>jaxb-api</artifactId>
            <version>2.3.0</version>
        </dependency>
    </dependencies>

</project>

 

persistence.xml

프로젝트 > src > main > resources 에 아래 이름의 package 생성

META-INF

해당 package에 persistence.xml 생성

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.2"
             xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_2.xsd">
    <persistence-unit name="hello">
        <properties>
            <!-- 필수 속성 -->
            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
            <property name="javax.persistence.jdbc.user" value="유저이름"/>
            <property name="javax.persistence.jdbc.password" value="유저 패스워드"/>
            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/jpaDB"/>
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL8Dialect"/>
             <!-- 옵션 -->
            <property name="hibernate.show_sql" value="true"/>          <!-- 실행창에 실제 날리는 DB 쿼리를 출력해줌 -->
            <property name="hibernate.format_sql" value="true"/>        <!-- 쿼리가 출력되는 형태를 이쁘게 잡아줌 -->
            <property name="hibernate.use_sql_comments" value="true"/>  <!-- 주석을 통해서 무슨 쿼리가 나온건지 알려줌 -->
            <property name="hibernate.jdbc.batch_size" value="10"/>     <!-- batch size만큼 모아서 한 방에 네트워크로 쿼리 전송하고 DB 커밋 (버퍼링 기능) -->
            <!--<property name="hibernate.hbm2ddl.auto" value="create" />-->
        </properties>
    </persistence-unit>
</persistence>

 

 

2. Gradle MySQL 연동

 

build.gradle 에 의존관계 추가

runtimeOnly 'com.mysql:mysql-connector-j'

 

build.gradle

plugins {
	id 'java'
	id 'org.springframework.boot' version '3.2.1'
	id 'io.spring.dependency-management' version '1.1.4'
}

group = 'study'
version = '0.0.1-SNAPSHOT'

java {
	sourceCompatibility = '21'
}

configurations {
	compileOnly {
		extendsFrom annotationProcessor
	}
}

repositories {
	mavenCentral()
}

dependencies {
	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
	implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
	implementation 'org.springframework.boot:spring-boot-starter-web'
	compileOnly 'org.projectlombok:lombok'
	developmentOnly 'org.springframework.boot:spring-boot-devtools'
	annotationProcessor 'org.projectlombok:lombok'
	runtimeOnly 'com.mysql:mysql-connector-j'
	testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

tasks.named('test') {
	useJUnitPlatform()
}

 

application.yml

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/[DB이름]?serverTimezone=Asia/Seoul&characterEncoding=UTF-8
    username: [username]
    password: [userpassword]
    
  jpa:
    show-sql: true
    database-platform: org.hibernate.dialect.MySQL8Dialect
    database: mysql
    hibernate:
      ddl-auto: update